星河科研社為銳星光學Sharpstar / Askar的香港獨家總代理，Sharpstar新推出的61EDPHⅢ攝星鏡、61EDPHⅢ f/4.4專用全幅減焦鏡及61EDPHⅢ專用全幅平場鏡現已接受eshop預訂。

Galaxy Scientific Group is Hong Kong sole dealer of Sharpstar and Askar. The new Sharpstar 61EDPH III Triplet APO, 61EDPHⅢf/4.4 Full-Frame Reducer and 61EDPHⅢ full frame flattener are available on eshop for pre-order now.

Sharpstar 61EDPHⅢ攝星鏡，定價HK$4280。

Sharpstar 61EDPH III Triplet APO , priced at HK$4280.

Sharpstar 61EDPHⅢ f/4.4專用全幅減焦鏡，定價HK$1480。

Sharpstar 61EDPHⅢ f/4.4 Full-Frame Reducer , priced at HK$1480.

Sharpstar 61EDPHⅢ 專用全幅平場鏡，定價HK$1480。

Sharpstar 61EDPHⅢ full frame flattener , priced at HK$1480.

全新F5.9 61EDPH Ⅲ在主鏡鏡片、外觀設計及配件設備三個方面進行了全面升級，是一款承載高性能和通用性的望遠鏡，能夠滿足不同用戶的拍攝需求，提供更加優質的拍攝體驗。主鏡採用三片式全分離APO設計，相較於二代升級為兩片低色散ED玻璃，擁有更加優異的成像表現，不僅能夠應用於目視觀測，而且能提供更高質量的天文攝影。61EDPH Ⅲ焦距360mm，焦比F5.9，全幅表現優異，可支持44mm影像圈。

The new F5.9 61EDPH Ⅲ has comprehensive upgrades on the primary lens, exterior design, and accessories, it is a telescope with high performance and versatility to meet the shooting needs of different users and provide a better shooting experience. The new 61EDPH Ⅲ adopts a triplet air-spaced APO design. Compared to the 61EDPHⅡ, it upgraded to two pieces of low dispersion ED glass for more excellent imaging performance. It not only can be applied to visual observation, but also can provide higher-quality astrophotography. 61EDPH Ⅲ has a focal length of 360mm, a focal ratio of 5.9, and supports the 44mm full-frame image circle.

61EDPH Ⅲ將二代的流線型提手升級成了多功能把手，可以接駁市面通用VIXEN規格的尋星鏡底座。此外將VIXEN窄版鳩尾板延長至了200mm，更容易接駁市面上各種赤道儀以及附件，有利於鏡筒在赤道儀上做平衡。

The 61EDPH Ⅲ upgraded the handle of the 61EDPHⅡ to a multifunctional handle, which can be connected to the universal vixen-style finder base. In addition, the 61EDPHⅢ is equipped with a 200mm long vixen dovetail plate, easier to connect to the equatorial mounts and accessories, and makes the OTA easier to balance on the mount.

61EDPH Ⅲ專用全幅減焦鏡，一端螺紋是M68×1，連接主鏡調焦器；另一端螺紋為M48×0.75，並內置2英寸濾鏡螺紋，後截距為55mm，如需擴展，可以旋下接口露出M54×0.75外螺紋，後截距變為75mm。減焦鏡片為四片式全分離結構，支持全畫幅攝影，減焦比F4.4配合61EDPH Ⅲ，焦距縮至270mm，是深空領域天體攝影的首選。

The special full-frame reducer of 61EDPH Ⅲ: One end of the thread is M68 × 1, connected to the primary lens focuser; the other end of the thread is M48 × 0.75 and has a built-in 2" filter thread. The back focus is 55mm. If it needs to be extended, the adapter can be screwed down to reveal the M54 × 0.75 male thread, and the back focus becomes 75mm. The focuser adopts a quadruplet air-spaced structure, supporting full-frame imaging. With the reducer, the focal ratio of 61EDPHⅢ reduced to F4.4 and the focal length reduced to 270mm, is the first choice for deep sky astrophotography.

此外61EDPH Ⅲ還配備了專用全幅平場鏡，為用戶提供了更多選擇。61EDPH Ⅲ平場鏡，一端螺紋是M68X1，連接主鏡調焦器；另一端螺紋為M48X0.75，並內置2英寸濾鏡螺紋，後截距為55mm，如需擴展，可以旋下接口露出M54×0.75內螺紋，後截距變為81.5mm，平場鏡片為三片式全分離結構，周邊減光控制優異，能有效改善像場彎曲，提高邊緣像質，減小畸變，使使用者能拍出更加清晰專業的天體照片。

In addition, 61EDPH Ⅲ is also equipped with a special full-frame flattener, providing users with more options. The flattener: One end of the thread is M68 × 1, connected to the primary lens focuser; the other end of the thread is M48 × 0.75 and has a built-in 2" filter thread. The back focus is 55mm. If it needs to be extended, the adapter can be screwed down to reveal the M54 × 0.75 male thread, and the back focus becomes 81.5mm. The flattener adopts a triplet air-spaced structure, the peripheral light reduction control is excellent, can effectively improve the curvature of the field, improve the corner image quality, and reduce aberrations, so that users can take clearer astronomical photos.